The results of column and heap bioleaching showed that 89.25% and 90.40% of uranium were recovered with the consortium and pyrite addition, which increased the uranium leaching rates by 13.22% and 8.96% as compared with the sulfuric acid leaching.
Get priceThe results of column and heap bioleaching showed that 89.25% and 90.40% of uranium were recovered with the consortium and pyrite addition, which increased the uranium leaching rates by 13.22% and 8.96% as compared with the sulfuric acid leaching.
Get price4 Principles of Microbial Metal Leaching 194 4.1 Leaching Mechanisms 194 4.2 Models of Leaching Mechanisms 194 4.3 Factors Influencing Bioleaching 197 4.4 Bacterial Attachment on Mineral Surfaces 200 5 Microbial Diversity in Bioleaching Environments 200 6 Case Studies of Bioleaching Appliions 208 6.1 CommercialScale Copper Ore Bioleaching 208
Get pricePDF This review describes the involvement of different microorganisms for the recovery of uranium from the ore. Mainly Acidithiobacillus forrooxidans. initial work on uranium bioleaching in the early s was taken to prevent oxidation rate of iron that may affect uranium''s microbial leaching.
Get priceThe percolation leaching of a uranium ore in the presence of microorganisms was carried out in semipilot experiments at different scales. microbial activity. The uraniumleaching efficiency
Get priceMicrobial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University Qaemshahr Branch Iran 1 Introduction This chapter is a review of the microbiological leaching of uranium ores Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium
Get priceIn situ microbial leaching is greater acceptance since it eliminates the expense of moving vast amounts of material. For instance thousand tons of uranium ore must be handled in other than bioleaching processes, to obtain one ton of uranium. This is an indirect leaching process since the microbial attack is not on uranium ore directly but on
Get priceBioleaching is the extraction of metals from their ores through the use of living organisms.This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is one of several appliions within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt
Get priceBioleaching of uranium was carried out with Turamdih ore sample procured from Uranium Corporation of India Limited, Jaduguda. The bacterial strain that was used in the leaching experiments was isolated from the Jaduguda mine water sample.
Get priceThe present situation,distribution characteristic and known reserve of both the world and China''s uranium resources are reviewed.On this basis,it is pointed out that though China has rich uranium resource,the future demand on uranium can′t be met due to the rapid
Get price65 Microbial Extract ion of Uranium from Ore s Parsonsite Pb 2 UO 2 (PO 4 ) 2 ⋅ 2H 2 O 26.1 Zaire Shoep (1923) Pitchblende UO 2 88.1 Many world wide Ring (1980), Agate (1983), Ketzinel
Get priceVol. 21, No. 8 (2009) Microbial Leaching of Uranium Ore 5809. Harrison et al.9 reported the role of the iron oxidizing Acidithiobacillus ferrooxidans in leaching of uranium. The uranium ore was stacked in heaps, similar to dump leaching of lowgrade copper ore and leached using an acidic ferric sulfate
Get priceA comparison of the uranium recovery from lowgrade ore by bioleaching and acid leaching 137 Uranium ores in Poland contain about 250–1100 mg kg1 U. Soils of Poland contain average amounts of U of 1.6 mg kg1 (lowland) and up to >10 mg kg1 in the mountain soils (Sudety Mountains).
Get priceUraniumbearing ore This reaction requires a source of iron and a high redox potential. In practice, the iron is usually obtained from pyrite – which is either associated with or added to the ore, and a high redox potential is achieved by adding oxidising agents such as pyrolusite (MnO 2
Get priceUranium (U) is one of the strategic elements and essential for many appliions as a fuel in nuclear power plants and nuclear weapons. Microbiological leaching has been used as an alternative approach to conventional hydrometallurgical methods of uranium''s recovery from low grade ores and waste samples Penicillium purpurogenium and Pseudomonas fluorescens SHA 281 were exhibited a good
Get priceUranium leaching is increased up to 20% while sulphuric acid consumption is simultaneously decreased by the addition of pyrite. Uranium concentrations in starting waste materials used for leaching were extremely low (0.0278 and 0.372% U) but about 60% recovery of uranium was obtained, with relatively low consumption of sulphuric acid.
Get priceVol. 21, No. 8 (2009) Microbial Leaching of Uranium Ore 5809. Harrison et al.9 reported the role of the iron oxidizing Acidithiobacillus ferrooxidans in leaching of uranium. The uranium ore was stacked in heaps, similar to dump leaching of lowgrade copper ore and leached using an acidic ferric sulfate
Get priceMicrobial Leaching of Uranium from Low Grade Ore and Waste Sample of Northern Part of Gabal Gatter, Egypt Using Penicillium Purpurogenium and Pseudomonas Fluorescens SHA 281 1Shimaa S. Hussien*, Osman A. Desouky1 Said E. Mohamadeyand 1 1Nuclear Materials Authority, P.O. Box 530 ElMaadi, Cairo, Egypt. *Corresponding Author: Shimaa S. Hussien
Get priceUranium is usually finely disseminated in ore bodies, making leaching the most common process to recover it instead of ore dressing for concentrate production. Many uranium ores processed via bioleaching have contained significant amounts of pyrite and other Fesulfides, which are oxidized to acidic ferric sulfate.
Get priceMicrobial Leaching of Uranium from Low Grade Ore and Waste Sample of Northern Part of Gabal Gatter, Egypt Using Penicillium Purpurogenium and Pseudomonas Fluorescens SHA 281 1Shimaa S. Hussien*, Osman A. Desouky1 Said E. Mohamadeyand 1 1Nuclear Materials Authority, P.O. Box 530 ElMaadi, Cairo, Egypt. *Corresponding Author: Shimaa S. Hussien
Get priceMicrobial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University Qaemshahr Branch Iran 1 Introduction This chapter is a review of the microbiological leaching of uranium ores Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium
Get priceMicrobial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University, Qaemshahr Branch Iran 1 Introduction This chapter is a review of the microbiological leaching of uranium or Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium
Get priceMicrobial Leaching of Uranium Ore IntechOpen. Sep 9, 2011 roasting of lowgrade ore was conducted at the RioTinto mines. oxidation rate of iron that may affect uranium''''s microbial leaching
Get price4 Principles of Microbial Metal Leaching 194 4.1 Leaching Mechanisms 194 4.2 Models of Leaching Mechanisms 194 4.3 Factors Influencing Bioleaching 197 4.4 Bacterial Attachment on Mineral Surfaces 200 5 Microbial Diversity in Bioleaching Environments 200 6 Case Studies of Bioleaching Appliions 208 6.1 CommercialScale Copper Ore Bioleaching 208
Get priceUranium (U) is one of the strategic elements and essential for many appliions as a fuel in nuclear power plants and nuclear weapons. Microbiological leaching has been used as an alternative approach to conventional hydrometallurgical methods of uranium''s recovery from low grade ores and waste samples Penicillium purpurogenium and Pseudomonas fluorescens SHA 281 were exhibited a good
Get priceUranium leaching is increased up to 20% while sulphuric acid consumption is simultaneously decreased by the addition of pyrite. Uranium concentrations in starting waste materials used for leaching were extremely low (0.0278 and 0.372% U) but about 60% recovery of uranium was obtained, with relatively low consumption of sulphuric acid.
Get priceMicrobial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University, Qaemshahr Branch Iran 1. Introduction This chapter is a review of the microbiological leaching of uranium ores. Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium''s extraction.
Get priceMicrobial Leaching of Uranium from Low Grade Ore and Waste Sample of Northern Part of Gabal Gatter, Egypt Using Penicillium Purpurogenium and Pseudomonas Fluorescens SHA 281 1Shimaa S. Hussien*, Osman A. Desouky1 Said E. Mohamadeyand 1 1Nuclear Materials Authority, P.O. Box 530 ElMaadi, Cairo, Egypt. *Corresponding Author: Shimaa S. Hussien
Get priceBioleaching is the extraction of metals from their ores through the use of living organisms.This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is one of several appliions within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt
Get price199371&ensp·&enspA bacterial leaching program was carried out in order to evaluate the potential of applying this process to leach uranium from the ore of Figueira—PR, Brazil. The experiments were carried out in shake flasks, column percolation (laboratory and scmipilot scale) and in heap leaching.
Get priceThe technical setup of uranium ore leaching may be the dump method, but sometimes a variation of this, socalled heap or basin leaching is applied. The ore is set up in basins. The mode of operation is preferably a two stage leaching: the outflowing liquor, in which the iron is largely in the ferrous form, is treated in an oxidation pond.
Get priceMicrobial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University Qaemshahr Branch Iran 1 Introduction This chapter is a review of the microbiological leaching of uranium ores Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium
Get priceThe technical setup of uranium ore leaching may be the dump method, but sometimes a variation of this, socalled heap or basin leaching is applied. The ore is set up in basins. The mode of operation is preferably a two stage leaching: the outflowing liquor, in which the iron is largely in the ferrous form, is treated in an oxidation pond.
Get priceRecent advances in microbial mining SpringerLink. Microbial Leaching of Uranium Ore 293 waste materials The waste materials low grad e black Schist consisted of 0 05 of uranium and 0 5 to 7 of carbonate Sampling showed the microorganisms aerobic and anaerobic were present till 1 5 to 2 meter of surface depth and more than 99 of Thiobacillus ferrooxidans were present within this depth
Get priceA comparison of the uranium recovery from lowgrade ore by bioleaching and acid leaching 137 Uranium ores in Poland contain about 250–1100 mg kg1 U. Soils of Poland contain average amounts of U of 1.6 mg kg1 (lowland) and up to >10 mg kg1 in the mountain soils (Sudety Mountains).
Get priceBosecker K., Wirth G. (1980) Bacterial Leaching of a Carbonate Bearing Uranium Ore. In: Biogeochemistry of Ancient and Modern Environments. Springer, Berlin, Heidelberg
Get priceBioleaching has lots of advantages compared with traditional heap leaching. In industry, bioleaching of uranium is still facing many problems such as site space, high cost of production, and limited industrial facilities. In this paper, a continued column bioleaching system has been established for leaching a certain uranium ore which contains high fluoride.
Get priceMicrobial Ore Leaching Boundless Microbial ore leaching is the process in which microorganisms are used to extract, is the process of extracting metals from ores with the use of microorganisms, "Steve Altaner, Mineral Resources: Formation, Mining, Environmental Impact More details » Get Price .
Get priceThe goal of the present work was to perform bioleaching of uranium from low grade ore from Vostok deposit (Republic of Kazakhstan), which was previously subjected to longterm acid leaching. The ore initially contained from 0.15 to 0.20% of uranium in the form of uraninite, but ore samples used in the study contained about 0.05% of uranium, as it was exhausted during acid leaching, and uranium
Get priceIn the bacterial leaching of Elliot Lake ore, the overall extraction rate that can be obtained is determined mainly by the particle size of the leach feed. On sizes coarser than 4 mesh, where 32 weeks or more is required to reach a uranium extraction of 70%, the extraction rate is related mainly to the rate at which the solutions penetrate the particle to depth.
Get priceUraniumbearing ore This reaction requires a source of iron and a high redox potential. In practice, the iron is usually obtained from pyrite – which is either associated with or added to the ore, and a high redox potential is achieved by adding oxidising agents such as pyrolusite (MnO 2
Get priceIn situ microbial leaching is greater acceptance since it eliminates the expense of moving vast amounts of material. For instance thousand tons of uranium ore must be handled in other than bioleaching processes, to obtain one ton of uranium. This is an indirect leaching process since the microbial attack is not on uranium ore directly but on
Get priceMicrobial Leaching of Uranium Ore IntechOpen. Sep 9, 2011 roasting of lowgrade ore was conducted at the RioTinto mines. oxidation rate of iron that may affect uranium''''s microbial leaching
Get price65 Microbial Extract ion of Uranium from Ore s Parsonsite Pb 2 UO 2 (PO 4 ) 2 ⋅ 2H 2 O 26.1 Zaire Shoep (1923) Pitchblende UO 2 88.1 Many world wide Ring (1980), Agate (1983), Ketzinel
Get price